A steel box girder assembly equipment spanning multiple roads

Abstract

This invention belongs to the field of steel box girder assembly technology, specifically a steel box girder assembly equipment spanning multiple roads. It includes four fixed frames. Two fixed frames on the same side have a connecting plate fixedly connected to their bottoms. Two lifting plates are slidably connected to the connecting plate. Two hydraulic cylinders are fixedly connected to the bottom of the connecting plate. The telescopic rods of the two hydraulic cylinders pass through the top of the connecting plate and are fixedly connected to the side wall of the corresponding lifting plate. A support platform is fixedly connected to the top of the two lifting plates. Two support plates are symmetrically fixedly connected to the ends of the support platform. A position adjustment mechanism is provided on the top of the support platform. By setting up the position adjustment mechanism, after the crane lifts the steel box girder to be assembled onto the support plate, the position adjustment mechanism is activated. The position adjustment mechanism pushes the steel box girder on the support plate to move, so that the position of the steel box girder on the support plate corresponds to the position of the steel box girder at the bottom, which is beneficial to the accuracy of the position of the steel box girder on the support plate.

Description

Technical Field

[0001] This invention belongs to the field of steel box girder assembly technology, specifically a steel box girder assembly equipment that spans multiple roads. Background Technology

[0002] Steel box girders, also known as steel plate box girders, are a common structural form for long-span bridges. They are generally used on bridges with large spans and are called steel box girders because their shape resembles a box.

[0003] Currently, in the process of assembling steel box girders, lifting equipment is generally used to lift the steel box girder to be assembled between two steel beams using slings, and then the steel box girder to be assembled is connected to the corresponding two steel beams.

[0004] However, when using hoisting, the steel box girder is prone to swaying during transportation. Construction workers need to hold the steel box girder to stabilize it and guide it to the assembly position. This method not only affects the accuracy of the placement of the steel box girder, but also poses safety hazards to the construction workers.

[0005] Therefore, the present invention provides a steel box girder assembly equipment that spans multiple roads. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by the present invention to solve its technical problem is as follows: The present invention provides a steel box girder assembly equipment spanning multiple roads, comprising four fixed frames. The bottom of two fixed frames located on the same side are fixedly connected to a connecting plate. Two lifting plates are slidably connected to the connecting plate. Two hydraulic cylinders are fixedly connected to the bottom of the connecting plate. The telescopic rods of the two hydraulic cylinders pass through the top of the connecting plate and are fixedly connected to the side wall of the corresponding lifting plate. The top of the two lifting plates are fixedly connected to a support platform. Two support plates are symmetrically fixedly connected to the ends of the support platform. A position adjustment mechanism is provided on the top of the support platform for adjusting the position of the steel box girder.

[0008] Preferably, the position adjustment mechanism includes two sliding grooves and two hydraulic cylinders. A movable frame is slidably connected within the two sliding grooves. The two hydraulic cylinders are fixedly connected to the end of the support platform away from the support plate. The telescopic rods of the two hydraulic cylinders pass through the end of the support platform and are fixedly connected to the movable frame. A hydraulic cylinder is fixedly connected in the middle of the movable frame. The telescopic rod of the hydraulic cylinder passes through the side wall of the movable frame and is fixedly connected to a push plate. Lateral adjustment components are provided at both ends of the movable frame. The lateral adjustment components are used to laterally adjust the steel box girder on the support plate.

[0009] Preferably, the lateral adjustment component includes a second slide groove, which is located on the side of the movable frame near the push plate. Two straightening plates are symmetrically slidably connected within the second slide groove, and driving components are provided at the ends of the two straightening plates. The driving components are used to control the simultaneous movement of the two straightening plates.

[0010] Preferably, the driving component includes a movable plate, which is slidably connected to the movable frame and fixedly connected to the telescopic rod of the hydraulic cylinder. Two inclined grooves and two straight grooves are symmetrically opened on the movable plate. The inclined grooves on the same side of the movable plate are interconnected. Guide shafts are slidably connected in both inclined grooves, and both guide shafts are fixedly connected to the ends of the correction plates at corresponding positions.

[0011] Preferably, the support plate has a mounting groove, a support shaft is rotatably connected in the mounting groove, and a rotating shaft is fixedly connected to the support shaft.

[0012] Preferably, the surface of the rotating shaft has multiple sets of mounting grooves II arranged in a circular array. An airbag is fixedly connected in the mounting groove II. An air supply component is provided at one end of the rotating shaft near the support platform. The air supply component is used to supply gas into the airbag.

[0013] Preferably, the gas delivery assembly includes a first delivery ring and a compressed gas tank. The first delivery ring is fixedly connected to one end of the rotating shaft near the support platform. A second delivery ring is rotatably connected to the first delivery ring and is fixedly connected to the inner wall of the end of the mounting groove. A delivery pipe is fixedly connected to the bottom of the second delivery ring. The compressed gas tank is fixedly connected to the bottom of the support plate. A solenoid valve is fixedly connected to the outlet of the compressed gas tank, and the output end of the solenoid valve is fixedly connected to the delivery pipe.

[0014] Preferably, two fixing blocks are fixedly connected to the end of the movable plate away from the support plate, and a pressure sensor is fixedly connected to the side of the two fixing blocks closer to the support plate.

[0015] Preferably, a positioning post is fixedly connected to the top of the end of the fixing frame away from the connecting plate, and a connecting rod is engaged between two positioning posts at corresponding positions.

[0016] Preferably, the end of the fixing frame near the connecting plate is threadedly connected to a threaded rod, and the end of the threaded rod away from the connecting plate is rotatably connected to a limiting plate, and the limiting plate is slidably connected to the fixing frame.

[0017] The beneficial effects of this invention are as follows:

[0018] The present invention discloses a steel box girder assembly equipment spanning multiple roads. By setting up a position adjustment mechanism, after the crane lifts the steel box girder to be assembled onto the support plate, the position adjustment mechanism is activated. The position adjustment mechanism pushes the steel box girder on the support plate to move, so that the position of the steel box girder on the support plate corresponds to the position of the steel box girder at the bottom. This is beneficial to the accuracy of the position of the steel box girder on the support plate, thereby improving the assembly efficiency. At the same time, it replaces the method of construction personnel holding the steel box girder to stabilize it and guide it to the assembly position, which helps to reduce safety hazards during the construction process.

[0019] The present invention discloses a steel box girder assembly equipment spanning multiple roads. By setting up an airbag and an air supply component, gas is supplied into the airbag after the air supply component is activated, causing the airbag to expand. On the one hand, this improves the friction between the rotating shaft and the steel box girder placed on the support plate. On the other hand, the airbag contacts and compresses the inner wall of the mounting groove, which helps to limit the rotation of the rotating shaft. This, in turn, improves the stability of the steel box girder placed on the support plate and prevents the steel box girder placed on the support plate from sliding and shifting during the descent of the support platform and support plate by the lifting plate. Attached Figure Description

[0020] The invention will now be further described with reference to the accompanying drawings.

[0021] Figure 1 This is a first-view schematic diagram of the present invention;

[0022] Figure 2 This is a second-view schematic diagram of the present invention;

[0023] Figure 3 This is a schematic diagram of the connection between the fixing frame and the connecting plate of the present invention;

[0024] Figure 4 This is a schematic diagram of the connection between the lifting plate and the support platform of the present invention;

[0025] Figure 5 This is a schematic diagram of the cross-section of the support plate of the present invention;

[0026] Figure 6 This is a partial structural diagram of the rotating shaft of the present invention;

[0027] Figure 7 This is a schematic diagram of the mobile frame of the present invention;

[0028] Figure 8 This is a schematic diagram of the movable plate of the present invention.

[0029] In the diagram: 1. Fixed frame; 2. Connecting plate; 3. Lifting plate; 4. Hydraulic cylinder one; 5. Support platform; 6. Support plate; 7. Mounting slot one; 8. Support shaft; 9. Rotating shaft; 10. Mounting slot two; 11. Airbag; 12. Conveying ring one; 13. Conveying ring two; 14. Conveying pipe; 15. Compressed air tank; 16. Solenoid valve; 17. Slide 1; 18. Moving frame; 19. Hydraulic cylinder two; 20. Hydraulic cylinder three; 21. Push plate; 22. Slide 2; 23. Correcting plate; 24. Moving plate; 25. Inclined groove; 26. Straight groove; 27. Guide shaft; 28. Fixed block; 29. ​​Pressure sensor; 30. Positioning column; 31. Connecting rod; 32. Threaded rod; 33. Limiting plate. Detailed Implementation

[0030] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0031] Combination Figures 1 to 3 As shown in the embodiment of the present invention, a steel box girder assembly device spanning multiple roads includes four fixed frames 1. Two fixed frames 1 located on the same side have a connecting plate 2 fixedly connected to their bottoms. Two lifting plates 3 are slidably connected to the connecting plate 2. Two hydraulic cylinders 4 are fixedly connected to the bottom of the connecting plate 2. The telescopic rods of the two hydraulic cylinders 4 pass through the top of the connecting plate 2 and are fixedly connected to the side wall of the corresponding lifting plate 3. A support platform 5 is fixedly connected to the top of the two lifting plates 3. Two support plates 6 are symmetrically fixedly connected to the ends of the support platform 5. A position adjustment mechanism is provided on the top of the support platform 5 for adjusting the position of the steel box girder. During operation... When assembling the steel box girder, the steel box girder to be assembled is first lifted onto the support plate 6 by a crane. Then, the position adjustment mechanism is activated, which moves the steel box girder on the support plate 6 so that its position corresponds to the position of the steel box girder at the bottom. This improves the accuracy of the position of the steel box girder on the support plate 6 and thus improves the assembly efficiency. It also replaces the method of construction workers holding the steel box girder to stabilize it and guide it to the assembly position, which helps to reduce safety hazards during construction. Finally, the hydraulic cylinder 4 is activated, which drives the lifting plate 3 to descend, so that the steel box girder on the support plate 6 is lowered and spliced ​​with the steel box girder at the bottom.

[0032] Combination Figure 2 , Figure 3 and Figure 4As shown, the position adjustment mechanism includes two sliding grooves 17 and two hydraulic cylinders 19. A movable frame 18 is slidably connected within the two sliding grooves 17. The two hydraulic cylinders 19 are fixedly connected to the end of the support platform 5 away from the support plate 6. The telescopic rods of the two hydraulic cylinders 19 pass through the end of the support platform 5 and are fixedly connected to the movable frame 18. A hydraulic cylinder 20 is fixedly connected in the middle of the movable frame 18. The telescopic rod of the hydraulic cylinder 20 passes through the side wall of the movable frame 18 and is fixedly connected to a push plate 21. Lateral adjustment components are provided at both ends of the movable frame 18. These lateral adjustment components are used to laterally adjust the steel box girder on the support plate 6. During operation, after the steel box girder is hoisted onto the support plate 6, the two hydraulic cylinders 19 are activated. The two hydraulic cylinders 19 push the movable frame 18, causing the push plate 21 to move to both sides of the end of the steel box girder. Then, the hydraulic cylinder 20 is activated. The telescopic rod of the hydraulic cylinder 20 moves the push plate 21, and during the movement of the telescopic rod of the hydraulic cylinder 20, the lateral adjustment components are activated. The entire assembly, the lateral adjustment assembly, adjusts the steel box girder on the support plate 6 laterally. After the lateral adjustment of the steel box girder on the support plate 6 is completed, the continued movement of the extension rod of hydraulic cylinder 3 20 no longer drives the lateral adjustment assembly. The extension rod of hydraulic cylinder 3 20 continues to push the push plate 21 closer to the steel box girder. The push plate 21 will push the steel box girder on the support plate 6 to adjust it longitudinally. After the position of the steel box girder is adjusted, hydraulic cylinder 1 4 is activated, so that the lifting plate 3 drives the steel box girder on the support plate 6 to descend and initially connect with the two steel box girders at the bottom. After the steel box girder on the support plate 6 descends and initially connects with the two steel box girders at the bottom, hydraulic cylinder 2 19 is activated. Hydraulic cylinder 2 19 pulls the moving frame 18 back to the initial position, which helps to avoid the moving frame 18 from obstructing the continued descent of the steel box girder. After hydraulic cylinder 2 19 pulls the moving frame 18 back to the initial position, the lifting plate 3 continues to descend, so that the steel box girder on the support plate 6 descends and fully connects with the two steel box girders at the bottom.

[0033] Combination Figure 3 , Figure 7 and Figure 8 As shown, the lateral adjustment assembly includes a second slide groove 22, which is located on the side of the movable frame 18 near the push plate 21. Two straightening plates 23 are symmetrically slidably connected within the slide groove 22. The ends of the two straightening plates 23 are equipped with driving components, which are used to control the simultaneous movement of the two straightening plates 23. During operation, as the extension rod of the hydraulic cylinder 3 20 drives the push plate 21 to move, it will also drive the driving component to move together. The driving component will then drive the two straightening plates 23 to move closer to each other, so that the straightening plates 23 can perform lateral adjustment of the steel box girder on the support plate 6, which is beneficial to improving the accuracy of the lateral adjustment of the steel box girder on the support plate 6.

[0034] Combination Figure 7 and Figure 8As shown, the driving component includes a movable plate 24, which is slidably connected to the movable frame 18 and fixedly connected to the telescopic rod of the hydraulic cylinder 20. Two inclined grooves 25 and two straight grooves 26 are symmetrically formed on the movable plate 24. The inclined grooves 25 on the same side of the movable plate 24 are interconnected. Guide shafts 27 are slidably connected within each of the two inclined grooves 25, and both guide shafts 27 are fixedly connected to the ends of the corresponding straightening plates 23. During operation, as the telescopic rod of the hydraulic cylinder 20 drives the push plate 21 to move, it will also drive the movable plate 24 to move together. 24 will drive the two straightening plates 23 to move closer to each other through the inclined groove 25 and guide shaft 27. The two straightening plates 23 will make lateral adjustments to the steel box girder placed on the support plate 6, which will help improve the accuracy of the lateral adjustment of the steel box girder on the support plate 6. After the guide shaft 27 slides into the straight groove 26, the extension rod of the hydraulic cylinder 3 20 will drive the moving plate 24 to continue moving without causing the two straightening plates 23 to move closer. The extension rod of the hydraulic cylinder 3 20 will drive the push plate 21 to continue moving, making longitudinal adjustments to the steel box girder placed on the support plate 6, which will help improve the accuracy of the longitudinal adjustment of the steel box girder on the support plate 6.

[0035] Combination Figure 3 , Figure 5 and Figure 6 As shown, the support plate 6 has an installation groove 7, and a support shaft 8 is rotatably connected in the installation groove 7. A rotating shaft 9 is fixedly connected to the support shaft 8. During operation, the setting of the rotating shaft 9 helps to reduce the friction between the steel box girder placed on the support plate 6 and the surface of the support plate 6, thereby improving the smoothness of the position adjustment mechanism in adjusting the steel box girder on the support plate 6.

[0036] Combination Figure 3 , Figure 5 and Figure 6 As shown, the surface of the rotating shaft 9 has multiple sets of mounting grooves 10 arranged in a circular array. An airbag 11 is fixedly connected inside the mounting groove 10. An air supply component is provided at one end of the rotating shaft 9 near the support platform 5. The air supply component is used to supply gas into the airbag 11. During operation, after the extension rod of the hydraulic cylinder 20 drives the push plate 21 to longitudinally adjust the steel box girder placed on the support plate 6, the air supply component is activated to supply gas into the airbag 11, causing the airbag 11 to expand. On the one hand, this is beneficial to the friction between the rotating shaft 9 and the steel box girder placed on the support plate 6. On the other hand, the airbag 11 contacts and squeezes the inner wall of the mounting groove 7, which helps to limit the rotation of the rotating shaft 9. This helps to improve the stability of the steel box girder placed on the support plate 6 and prevent the steel box girder placed on the support plate 6 from sliding and shifting during the process of the lifting plate 3 driving the support platform 5 and the support plate 6 to descend.

[0037] Combination Figure 5As shown, the gas supply assembly includes a first conveying ring 12 and a compressed air tank 15. The first conveying ring 12 is fixedly connected to one end of the rotating shaft 9 near the support platform 5. A second conveying ring 13 is rotatably connected to the first conveying ring 12, and the second conveying ring 13 is fixedly connected to the inner wall of the end of the mounting groove 7. A conveying pipe 14 is fixedly connected to the bottom of the second conveying ring 13. The compressed air tank 15 is fixedly connected to the bottom of the support plate 6. A solenoid valve 16 is fixedly connected to the outlet of the compressed air tank 15. The output end of the solenoid valve 16 is fixedly connected to the conveying pipe 14. During operation, after the extension rod of the third hydraulic cylinder 20 drives the push plate 21 to make longitudinal adjustments to the steel box beam placed on the support plate 6, the solenoid valve 16 is activated, and the compressed air tank 15 and the conveying pipe 14 are connected. The high-pressure gas contained in the compressed air tank 15 enters the air bag 11 through the solenoid valve 16, the conveying pipe 14, the second conveying ring 13, and the first conveying ring 12 in sequence, causing the air bag 11 to expand, which helps to improve the stability of the steel box beam placed on the support plate 6.

[0038] Combination Figure 7 and Figure 8 As shown, two fixing blocks 28 are fixedly connected to the end of the movable plate 24 away from the support plate 6. Pressure sensors 29 are fixedly connected to the side of the two fixing blocks 28 near the support plate 6. During operation, after the extension rod of the hydraulic cylinder 20 drives the push plate 21 to make longitudinal adjustment of the steel box beam placed on the support plate 6, the pressure sensor 29 abuts against the movable frame 18, and then the solenoid valve 16 is activated, so that the high-pressure gas stored in the compressed gas tank 15 is released.

[0039] Combination Figure 1 and Figure 2 As shown, a positioning post 30 is fixedly connected to the top of the end of the fixed frame 1 away from the connecting plate 2, and a connecting rod 31 is snapped between the two positioning posts 30 at the corresponding positions. During operation, the setting of the connecting rod 31 facilitates the connection of the two fixed frames 1, which helps to improve the overall structural stability of the two fixed frames 1 at the corresponding positions.

[0040] Combination Figure 2 and Figure 3 As shown, the end of the fixed frame 1 near the connecting plate 2 is threadedly connected to a threaded rod 32, and the end of the threaded rod 32 away from the connecting plate 2 is rotatably connected to a limiting plate 33, and the limiting plate 33 is slidably connected to the fixed frame 1. During operation, the threaded rod 32 and the limiting plate 33 facilitate the adjustment of the fixed frame 1 so that the fixed frame 1 can be adjusted in position on the side wall of the steel box girder.

[0041] Working principle: When assembling the steel box girder, the steel box girder to be assembled is first lifted onto the support plate 6 by a crane. Then, two hydraulic cylinders 19 are started. The two hydraulic cylinders 19 push the moving frame 18 to move the push plate 21 to both sides of the end of the steel box girder. Then, hydraulic cylinder 20 is started. The telescopic rod of hydraulic cylinder 20 moves the push plate 21.

[0042] During the movement of the push plate 21 driven by the telescopic rod of hydraulic cylinder 20, the moving plate 24 will also move. The moving plate 24 will then drive the two straightening plates 23 to move closer to each other through the inclined groove 25 and the guide shaft 27. The two straightening plates 23 will make lateral adjustments to the steel box girder placed on the support plate 6, which will help improve the accuracy of the lateral adjustment of the steel box girder on the support plate 6. After the guide shaft 27 slides into the straight groove 26, the continued movement of the moving plate 24 driven by the telescopic rod of hydraulic cylinder 20 will not cause the two straightening plates 23 to move closer to each other. The telescopic rod of hydraulic cylinder 20 will drive the push plate 21 to continue moving, making longitudinal adjustments to the steel box girder placed on the support plate 6, which will help improve the accuracy of the longitudinal adjustment of the steel box girder on the support plate 6.

[0043] During the position adjustment process, the setting of the rotating shaft 9 on the steel box girder on the support plate 6 helps to reduce the friction between the steel box girder placed on the support plate 6 and the surface of the support plate 6, thereby improving the smoothness of the position adjustment mechanism in adjusting the steel box girder on the support plate 6.

[0044] After the extension rod of hydraulic cylinder 20 drives push plate 21 to longitudinally adjust the steel box girder placed on support plate 6, pressure sensor 29 abuts against moving frame 18, and then controls solenoid valve 16 to start, compressing air tank 15 and conveying pipe 14 to connect. The high-pressure gas in compressed air tank 15 enters airbag 11 through solenoid valve 16, conveying pipe 14, conveying ring 13 and conveying ring 12 in sequence, causing airbag 11 to expand. On the one hand, this is beneficial to the friction between rotating shaft 9 and steel box girder placed on support plate 6. On the other hand, airbag 11 contacts and squeezes the inner wall of mounting groove 7, which helps to limit the rotation of rotating shaft 9, thereby improving the stability of steel box girder placed on support plate 6 and preventing sliding displacement of steel box girder placed on support plate 6 during the process of lifting plate 3 driving support platform 5 and support plate 6 to descend.

[0045] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A steel box girder assembly equipment spanning multiple roads, characterized in that: It includes four fixed frames (1), and the bottom of two fixed frames (1) located on the same side are fixedly connected to a connecting plate (2). Two lifting plates (3) are slidably connected on the connecting plate (2). Two hydraulic cylinders (4) are fixedly connected to the bottom of the connecting plate (2). The telescopic rods of the two hydraulic cylinders (4) pass through the top of the connecting plate (2) and are fixedly connected to the side wall of the corresponding lifting plate (3). The top of the two lifting plates (3) are fixedly connected to a support platform (5). Two support plates (6) are symmetrically fixedly connected to the end of the support platform (5). A position adjustment mechanism is provided on the top of the support platform (5). The position adjustment mechanism is used to adjust the position of the steel box girder. The position adjustment mechanism includes two slide grooves (17) and two hydraulic cylinders (19). The two slide grooves (17) are slidably connected to a movable frame (18). The two hydraulic cylinders (19) are fixedly connected to the end of the support platform (5) away from the support plate (6). The telescopic rods of the two hydraulic cylinders (19) pass through the end of the support platform (5) and are fixedly connected to the movable frame (18). The middle of the movable frame (18) is fixedly connected to a hydraulic cylinder (20). The telescopic rod of the hydraulic cylinder (20) passes through the side wall of the movable frame (18) and is fixedly connected to a push plate (21). The two ends of the movable frame (18) are provided with lateral adjustment components. The lateral adjustment components are used to adjust the steel box beam on the support plate (6) laterally. The lateral adjustment assembly includes a second slide (22), which is located on the side of the movable frame (18) near the push plate (21). Two straightening plates (23) are symmetrically slidably connected in the second slide (22). The ends of the two straightening plates (23) are provided with driving components, which are used to control the two straightening plates (23) to move simultaneously. The driving component includes a movable plate (24), which is slidably connected to the movable frame (18) and fixedly connected to the telescopic rod of the hydraulic cylinder (20). Two inclined grooves (25) and two straight grooves (26) are symmetrically opened on the movable plate (24). The inclined grooves (25) and straight grooves (26) on the same side of the movable plate (24) are interconnected. Guide shafts (27) are slidably connected in both inclined grooves (25). Both guide shafts (27) are fixedly connected to the ends of the correction plate (23) at the corresponding positions.

2. The steel box girder assembly equipment spanning multiple roads according to claim 1, characterized in that: The support plate (6) has an installation groove (7), a support shaft (8) is rotatably connected in the installation groove (7), and a rotating shaft (9) is fixedly connected on the support shaft (8).

3. The steel box girder assembly equipment spanning multiple roads according to claim 2, characterized in that: The surface of the rotating shaft (9) has multiple sets of mounting grooves (10), which are arranged in a ring array. An airbag (11) is fixedly connected in the mounting groove (10). A gas delivery component is provided at one end of the rotating shaft (9) near the support platform (5). The gas delivery component is used to deliver gas into the airbag (11).

4. The steel box girder assembly equipment spanning multiple roads according to claim 3, characterized in that: The gas delivery assembly includes a first delivery ring (12) and a compressed gas tank (15). The first delivery ring (12) is fixedly connected to one end of the rotating shaft (9) near the support platform (5). A second delivery ring (13) is rotatably connected to the first delivery ring (12), and the second delivery ring (13) is fixedly connected to the inner wall of the end of the mounting groove (7). A delivery pipe (14) is fixedly connected to the bottom of the second delivery ring (13). The compressed gas tank (15) is fixedly connected to the bottom of the support plate (6). A solenoid valve (16) is fixedly connected to the outlet of the compressed gas tank (15). The output end of the solenoid valve (16) is fixedly connected to the delivery pipe (14).

5. The steel box girder assembly equipment spanning multiple roads according to claim 1, characterized in that: Two fixing blocks (28) are fixedly connected to the end of the movable plate (24) away from the support plate (6), and pressure sensors (29) are fixedly connected to the side of the two fixing blocks (28) close to the support plate (6).

6. The steel box girder assembly equipment spanning multiple roads according to claim 1, characterized in that: The top of the fixed frame (1) away from the connecting plate (2) is fixedly connected to a positioning post (30), and a connecting rod (31) is snapped between the two positioning posts (30) at the corresponding positions.

7. The steel box girder assembly equipment spanning multiple roads according to claim 1, characterized in that: The fixed frame (1) has a threaded rod (32) threadedly connected to one end near the connecting plate (2), and a limit plate (33) is rotatably connected to the other end of the threaded rod (32) away from the connecting plate (2), and the limit plate (33) is slidably connected to the fixed frame (1).

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